Jun Geng, Guang-Hui Song, & Jun-Jie Zhu. (2023). Er3+- Doped ZnO Nanospheres with Enhanced Upconversion Photoluminescence Produced through Sonochemical Synthesis. Current Topics and Emerging Issues in Materials Sciences Vol. 2, 170–179. https://doi.org/10.9734/bpi/cteims/v2/18981D